JSFiddle - React, Tailwind, and code Playground

HTML

<table class="fixed-bar" width="1333" height="48" border="0" align="center">
            <tr>
                <td width="96" rowspan="2">&nbsp;</td>

                <td><hsso style="font:'Trebuchet MS', Arial, Helvetica, sans-serif; text-shadow:#0C0 0.1em 0.1em 0.3em; color:#030; font-size:32px; text-align:center;">Hallmark Secondary School Alumni</hsso></td>
        <td><a class="linear" href="signup">
                <span>Sign Up </span>

            </a>
        </td>
    </tr>
    <tr>
        <td  class="nav-bar1" align="left">   



        </td>
        <td width="158" align="left">&nbsp;</td>
    </tr>
</table>
        <div style="height: 80px; width: 100%;"></div> 
 <table width="361" height="891" border="0" align="center" class="tab1" >
    <tr>
        <td width="467" align="center"><input placeholder="Username" autocomplete="on" class="inp" type="text" name="un" id="un"></td>
    </tr>
    <tr>
      <td align="center"><input placeholder="Password" autocomplete="on" class="inp" type="text" name="pw" id="pw"></td>
    </tr>
    <tr>
      <td align="center"><input placeholder="Re-enter Password" autocomplete="on" class="inp" type="text"></td>
    </tr>
    <tr>
      <td align="center"><input placeholder="First Name" autocomplete="on" class="inp" type="text" name="fn" id="fn"></td>
    </tr>
    <tr>
      <td align="center"><input placeholder="Last Name" autocomplete="on" class="inp" type="text" name="ln" id="ln"></td>
    </tr>
    <tr>
        <td align="center"><select class="sel"   name="st"  id="st">
        <option>Please Select your Set</option>
        <option>1997/1998</option>
        <option>1998/1999</option>
        <optiom>1999/2000</optiom>
        <option>2001/2002</option>
        <option>2002/2003</option>
        <option>2003/2004</option>
        <option>2005/2006</option>
        <option>2006/2007</option>
        <option>2007/2008</option>
        <option>2008/2009</option>
        <option>2009/2010</option>
       ...

CSS

table.fixed-bar{
      box-shadow:#0C0 0.1em 0.2em 0.5em 0.1em;
    border-radius: 8px;
    position: fixed; 
    top: 0; 
    width: 100%; 
    left: 0; 
    clear: both;
    background:#fff;

}
table.tab1{
     border-radius: 8px;
    box-shadow:#0C0 0.1em 0.2em 0.5em 0.1em;  

}